Garment bag making equipment



A ril 23, 1963 D. c. GIMPLE 3,086,577

GARMENT BAG MAKING EQUIPMENT Filed March 9, 1960 3 Sheets-Sheet 1 I I q.T

N INVENTOR. 5 David C. Gimp/e ATTORNEYS April 23, 1963 D. c- IMPLE3,086,577

GARMENT BAG MAKING EQUIPMENT Filed March 9, 1960 3 Sheets-Sheet 2 "In"HI! :E: go Z INVENTOR. David C. Gimp/e BY I ATTORNEYS April 23, 1963 o.c. GIMPLE 3,086,577

GARMENT BAG MAKING EQUIPMENT 7 Filed March 9, 1960 5 Sheets-Sheet 3INVENTOR. Da vid C. Gimp/e ATTORNEYS United States Patent 3,086,577 GARME NT BAG MAKING EQUIPMENT David C. Gunple, 1039 Kalmia St., Boulder,Colo. Fried Mar. 9, 1960, Ser. No. 13,942 9 (Ilaims. (Cl. 156-495) Thisinvention relates to bag making process and equipment, and moreparticularly to equipment for making very lightweight plastic garmentbags and to the method of producing preformed bags in long strips whichmay be Wound into rolls and from which the bags may be individuallyremoved on predetermined separate lines as needed.

In recent years very thin, lightweight plastic sheeting has been used tomake garment bags for use by tailors, garment manufacturers and moreparticularly by dry cleaning establishments to cover a few garmentshanging on clothes hangers. Such protective bags are replacing papergarment bags due in part to their cheapness, ease of use and reducedstorage requirements. In one method, rolls of plastic tubing aresupplied to a user who has a machine arranged with heating strips and aknife for initially sealing the tubing across its lateral extent formingthe top of the bag, and then cutting the formed bag from the roll. Sucha system, however, is an intermittent process, is time consuming andwastes material since generally the user does not or cannot take thetime to accurately measure the length of the bag required for theparticular garment or garments being covered.

According to the present invention there is provided a mechanism forpresealing and partially cutting bags from a roll of plastic tubing insuch a manner that the bags are held together by small lands of plastictherebetween so that a simple, quick jerk on the plastic will severindividual bags from the roll. The mechanism, also, provides means forcutting a large number of selfclosing slits in the plastic tubingproviding a foraminous bag as protection against accidental suffocationby users while maintaining such a bag as a protection against soilingenclosed garments by moisture and dirt whether caused by handling ormerely storage. The mechanism, furthermore, provides means forcontinuously slitting, cutting and sealing the plastic tubing, andfurther provides means for tightly rolling the cut and formed bags on aroll.

Included among the objects and advantages of the present invention is amechanism for preforming and partially severing bags from a long stripof collapsed, plastic tubing whereby the bags are arranged in longstrips which may be wound into rolls. Bags may be individually severedbags from the roll for use along predetermined sever lines. Themechanism provides means for slitting a plurality of self-sealing slitsin plastic garment bags so that the bags retain their essential coveringcharacteristics. The mechanism, furthermore, provides means forcontinuously forming bags from an elongated strip and rolling thepreformed bags in a strip in a roll for subsequent use. The inventionprovides a process for forming such self-closing slits and making suchbags.

These and other objects and advantages of the invention may be readilyascertained by referring to the following description and appendedillustrations in which:

FIG. 1 is a schematic elevational view of the mechanism of the inventionillustrating the slitting section, and sealing and cutting section ofthe bag forming machine and the subsequent rewind mechanism for finishedbags;

FIG. 2 is a side elevational view of the mechanism for sequentiallymoving the sealing roll and cutting roll into and out of engagement witha back-up platen',

FIG. 3 is a top plan view of a core holder of the rewind mechanism;

ice

FIG. 4 is an elevational view of a slitting roller and back-up platenaccording to the invention;

FIG. 5 is an elevational view of a cutting roller according to theinvention;

FIG. 6 is a partial view of a length of plastic tube material preformedinto bags and held together by joining lands of plastic sheeting;

FIG. 7 is a schematic view of a gusset opener arranged in operatingposition with plastic tubing;

FIG. 8 is an elevational view of a sealing roller for the plastic tubingshowing a means for providing electricity for the sealing element; and

FIG. 9 is a weight roller for the rewind section of the bag makingmachine.

The bag making machine shown in FIG. 1 includes a frame 1 arranged tosupport the mechanism at an operable height, and to hold the parts inrelative position. The frame may be mounted on suitable foundation orportable framework, not shown. Upright members 2 are arranged to supportan axle or shaft 3 on which may be mounted a roll of plastic tubing 4.Such tubing is normally extruded, gusseted, that is, with opposed sidesof the wall folded in, and the tube flattened and rolled so that itlooks like sheet material of double thickness. Supported on the frame isa slitting roll 10 and a backup platen 11 which is arranged to slit aplurality of holes in the tubing. The slitting rollers are shown indetail in FIG. 4, wherein a plurality of triangular-shaped knives 12 arespaced around the roller. These knives in circumferential lines arearranged to register with a plurality of grooves 13 in the back-uproller 11. The slitting roll 10 and back-up roll 11 are maintained inclose proximity to each other so as to grip the plastic sheet passingtherebetween. The roll of plastic 4 is partially braked so that rotationof the rolls 10 and 11 maintains the plastic web 5 under tension. Freerotation of the roll 4 may conveniently be prevented by a friction brake(not shown) acting on the axle to prevent free rotation of the axle ofthe roll 4. The roller 10 may be driven at a speed so that itsperipheral surface is overdriven about 20% faster than the web travel tomaintain the tension on the web during slitting. By thus maintaining theWeb under tension, the slits are self-closing and remain closed unlessthe web is pulled laterally. In one form, the grooved roller 11 may bemaintained essentially stationary, and subsequent rollers in themechanism maintain the web under tension during the slitting.

A pair of posts 15 and 16, FIG. 7 are mounted on opposed sides of theframe 1 adjacent the slitting roller 10, and -a pair of gusset openingfingers v17 are mounted in the uprights 15 and 16. The gusset openersare adjustably held in the rnounts 15 and 16 by means of a setscrew 1-8and 19, respectively. In one form the gusset opening fingers include alooped portion 20 which is arranged to ride in a gusset opening thesame. In the manufacture of the plastic tubing, after the gussets areturned in, the plastic tubing is wound tightly on a roll. Since with thegussets turned in there is a thickness of four layers at the roll end,there is additional pressure on these four layer edges which tends tocause sticking of the plastic in the gussets. The gusset opening fingersriding in the gusset groove permits the gusset to open readily so thatthe bag will open the full size for use. -In some instances, powder maybe blown into the gussets, after being opened, to prevent subsequentsticking.

A pair of upright members 22 mounted on the opposed sides of the frameand spaced from and adjacent to the uprights 15, support a concavespreader roller 23 mounted on an axle or shaft 24 for rotation. Theroller 23 is slightly concave so that it keeps the web essentially,fully spread, and smoothly and evenly taut in a lateral direction forits entrance onto a hardened platen 32 as will be explainedsubsequently.

Mounted on the frame 1 adjacent the concave spreader roller 23 are apair of enlarged upright end plates 30 spaced apart on opposite sides ofthe frame 1. A plurality of rollers are mounted on the plates as will beexplained. The first such roller is a rubber, or other resilientmaterial, covered roller 31 mounted closely adjacent a hardened rolleror platen 32, both of which are journalled for rotation in the uprights30. A sealing roller 33 has a heating element 34 mounted on the surfacethereof. Mounted above the hardened platen 32 is a cutting roller 35having a knife element 36 mounted on the periphery thereof. Theoperation of the sealing and cutting rollers is explained below. Anotherrubber cover roller 37 is mounted on the opposite side of the hardenedplaten 32 and is arranged to pass the web from the bag forming sectionto a rewind section which is mounted on a framework 40. The two rubbercovered rollers hold the plastic web taut on the hardened platen. Ananti-static electricity device 38 may be installed when desired. Suchdevices are commonly known and available on the open market.

The rewind section includes a pair of rollers 41 and 42 which are drivenrollers, and the roller 42 is driven at about 1% greater speed than theroller 41. These rollers may be geared separately to a drive, or throughan integral drive (not shown) with the cutting and sealing section. Apair of end plates 40 mounted on the frame 1 supports the rollers 41 and42. A pair of upright channel members 43 mounted on each side of theplates 40 supports a rewind roller 44. The roller 44 is supported in thechannels 43 and freely rests on the two drive rewind rolls 41 and 42. Aweighted tension roller 45 is supported in the channels 43 and it freelyrests on the rewind roll 44. The web passes over the weighted roller 45onto the rewind roller 44, the details of which will be explained below.

In the bag forming section, the rubber covered rollers 31 and 37 holdthe web stretched tightly on the hardened platen 32 during operation ofthe sealing and cutting rollers. The cutting and sealing rollers operatein a sequence with the sealing roller engaging the web first andimmediately thereafter the cutting roller cutting the web along a lineadjacent the bag forming seal.

The cutting roller is shown in partial detail in FIG. 5 wherein ametallic roller 35 has secured to it a series of knife blades 51 and 52which extend a short distance outwardly from the roller surface atangles inwardly directed to the roller axis from the roller edges. Theknife blades 51 and 52 extend approximately the width of the tube butleave a portion of the tube uncut along each edge. A serrated knife edge53 between the two angle sections leaves a series of lands between bagsections of the tube. A series of notches 54 in the knife blades cause adiscontinuity in the cut and leave lands which hold the preformed bagsections together in an elongated sheet. Since the knife blades extendpartially around the periphery of the roller, it must be an arcuateknife blade, and it may be held on the roll by any known means. Further,the knife blade may be spring-loaded so as to provide a positive cuttingaction with a uniform pressure across the roller. During the actualcutting operation the roller 50 is moved in close proximity to thehardened platen 32,. so that the knife edges 51 and 52 and the serratedknife all bear against its surface cutting the plastic tubingtherebetween. Under normal circumstances, the plastic for forming thebags is approximately 0.0005 of an inch thick so that the folded plasticin the middle of the bag passing over the roller is on the order of0.00010. This is the minimum thickness which must be cut, since thegusseted edges are four thicknesses.

The sealing roller 33 includes shafts 55 arranged to be journalled forrotation in the frame, and a pair of contacts 57 mounted on the rollerare insulated from the remainder of the roller, since such a roller ismade of steel. Brushes 58, connected to electric leads not shown, rideon the contactor strips 57 and provide means for heating a Nichromestrip 59 which extends across the roller in a fiat triangularconfiguration. The Nichrome strip is mounted on a silicone rubberbacking sheet covered with a glass cloth and is thus insulated from theroller. A thin nonelectrical covering, such as a polyfluoroethylene,such as Du Ponts Teflon, covers the Nichrome wire and prevents stickingof the Wire on the plastic while permitting transfer of sufiicient heatfor sealing the plastic. A properly controlled current applied to thebrushes 58 will provide sufiicient heating for sealing across the tubeat the speed of operation.

The rubber covered rollers 31 and 37 are mounted in relative position tothe hardened platen 32 so as to feed and hold the plastic tubing tightlyon the roller. The sealing and cutting rollers 33 and 35, however, arenormally spaced from the platen and are moved into and out of engagementwith the platen for bag forming operations. As pointed out, thethickness of the two sheets in the middle of the tube is 0.00010, and onthe ends where the gussets are folded under there is a thickness ofabout 0.00020 due to the two extra thicknesses of material. Thus it isseen that the sealing members and the cutting knives may be maintainednormally 30 to 50 thousandths from the surface of the hardened platenand be readily moved into sealing or cutting position against theplastic tubing. One method of movement of the rolls in relation to theplaten is shown in FIG. 2, wherein the platen 32 is arranged to rotateon shaft 29. Interconnected with the shaft 29 and conjointly rotatabletherewith is a gear 60. A gear 61 mounted on shaft 62 of the cuttingroller 35 meshes with the gear 60 on the platen 32. A gear 63 mounted onshaft 55 of the sealing roller 33 is, likewise, meshed with the gear 60of the roller 32. The gears on the platen 32 and the rollers 33 and 35are modified spur gears with less taper so that the rollers 35 and 33may be moved inwardly and outwardly in relation to the gear and stillremain meshed therewith with sufficient contact surface for conjointrotation.

The rollers 33 and 35 are alternately moved into con tact with thesurface of the platen 32 at predetermined times to provide the desiredsize of bag. One means is by a cam 65 depressing a pair of lever arms 66(only one of which is shown) which in turn depress connecting rods 67and 68 which are connected respectively to rocker arms 69 and 70. Therocker arms move the rollers 33 and 35 respectively onto the platen. Camsurfaces 72 and 73 on the cam 65 are spaced about ninety rotationdegrees apart, which corresponds approximately to the angular distanceapart between the rollers 33 and 35. There is a slight difference sothat the cutters are depressed so as to cut the bag ahead of the sealwhich has been previously made. The cam raised surface 72 impingesagainst a roll pin 74 which depresses one of the lever arms 66 pullingdown the connecting rod 67 which in turn rotates the shaft 55 slightly.An eccentric bearing 77 mounted in the frame 78 turns forcing the roller33 onto the platen 32. After passing raised surface 72, the parts beingspring-loaded, not shown, return to original position. As the cam passesthe pin 74, the raised cam surface 73 strikes the roller pin secured tothe other lever arm 66 which depresses the same pulling down theconnecting rod 68 and pivoting [rocker arm about a shaft 80. The shaft80 is mounted in an eccentric bearing 81 mounted in uprights 82 which inturn moves the frame member 83 about pivot 84 downwardly carrying withit the roller 35 into contact with the platen 32.

A gear 85, only partially shown, meshes with a gear 86, only partiallyshown, on the shaft 29 of the platen 32, and this gear 85, also,interconnects with the gear 87 mounted on the shaft 88 of the cam 65. Bychanging the diameter of the gear 87, the length of bag may be changedsince it changes the operation of the cam, and operation of sealing andcutting rollers onto the platen. In changing the size of the gear 87,the distance between the shaft of the gear 85 of the shaft 88 changesand the gear 85 is mounted on a rocker arm 90 which permits the positionof the shaft to be changed interconnecting the parts. The

gearing arrangement interconnects the parts so that the peripheral speedof the cutting and sealing rollers is the same as the peripheral speedof the platen on which they operate. By merely changing the gears, thelength of the bag may be changed, however, the distance between the sealand the cut formed by the sealing and cutting rollers is determined bythe distance apart of the cam surfaces 72 and 73.

The rewind section is interconnected by conventional means, not shown,to the platen, as for example, sprockets and chains which maintainsubstantially exact rotation between the parts. Such means may, also, begearing or the like. In the rewind section the rollers 41 and 42 arepreferably metallic rollers rotatively interconnected with the platen 32so that the roller 41 has essentially the same peripheral speed as theplaten 32. As pointed out above, the roller 42 is overdriven about 1%greater than the roller 41 to tightly rewind the plastic on the rewindtube.

In rewinding, a paper tube 100, shown in FIG. 3, is mounted over therewind roller 44. The paper tube is pressed against a washer -101 at oneend of the roller 44 and is held in place by a nut 102 threadedlyattached to the opposite end of the roller 44. This maintains the tubetight on the roller so that it rotates conjointly with it. The plasticis rolled on the paper tube, and the completely rewound roll is easilyremoved from the tube 44 along with its paper tube support 100 by merelyremoving the nut 102.

The rewind roller 44 includes a pair of bearing sets 104 mounted on eachend of a shaft 105. The bearing sets are arranged to freely ride in thechannels 43 during the rewind operations so that the rewind tube freelymoves vertically in the channel 43 on increasing thickness of rewoundmaterial. The channels retain the rewind roller centered on the rollers41 and 42. The contact between. the roller 44 and the rollers 41 and 42does not change essentially during the rewind operation even with theincreasing size of the plastic roll. Thus the peripheral speed of theplastic on the rewind roll is maintained substantially the same as theperipheral speed of the platen 32. This maintains tension on the plasticweb throughout the operation including the rewinding. As the roll getslarger there will, of course, be a slight change in contact with rolls41 and 42, but the change is insignificant in relation to the speed. Theweighted rewind roller 45 includes partially mill ends 107 and 108 whichprovide a shallow relief for the gussets so as to maintain tension onthe plastic web completely across its lateral extent during rewinding.The roller 45 is generally metal and includes shafts 1 having mountedthereon bearing sets 111. These bearing sets, also, ride freely in theupright channels 43 so that the roller is maintained in position restingon and rotating with the rewind roller 44. 7

As shown in FIG. 1, the plastic sheet passes over the roller 45- whichis resting on the roller 44. As the plastic is rewound on the tubularmember 100 on the roller 44, the roll naturally gets larger, and thebearing sets of both rollers 44 and 45 resting in the channels 43 ridefreely and rise as the roll gets larger. The construction makes removalof the finished plastic rolls and reassembly for additional operationseasy and fast.

A section of plastic tubing is shown in FIG. 6, wherein finished bagelements are maintained in a sheet. A complete bag 120 is illustrated inthe middle of partially shown bags 121 and 122 on each side thereof. Thebag 120 includes a sealing portion 123 at one end which extend fromapproximately the edge of the sheet to a point in the center. The sealis arranged to leave a hole which is large enough for the hook of ahanger to pass. The angle of the sealed portions 123 is approximatelythe angle of the standard clothes hanger. A cut portion is provided fromabout a half to one inch from the seal portion 30 into the next bag 122.The cut portions do not extend completely to the edges but leave smalllands 131 on each side. The notches in the knife cutters leave lands 132in the cuts. A perforated cut, which is above the hook opening in theseal members, provides a series of small lands holding the central partof the cut together. This provides suflicient lands of material betweenseparate bags for holding the bags in a single sheet but the bags areeasily severable from the sheet. The body of the garment bag is usuallyeither 36 or 54 inches for most uses. Special sizes may be made for anyparticular system by merely changing the size of the gears operating thecam which moves the sealing and cutting rollers into contact with theplaten.

It is to be noted that there is no perpendicular cut in the bag forminga perpendicular bottom since the same is not necessary. The slight anglecut at the bottom of the bag is not detrimental to the use of the bag,and in fact tends to hold the bag in better position on the containedclothes and provides more complete coverage over the garments.

After the bags are preformed and rerolled they are used by mounting on astand, usually above a clothes support. In this position the bottom ofthe bag may be opened, pulled over the hangered clothes with a light,sharp jerk which severs the individual bag from the roll. The bag isthus easily severed without imparting an unrolling motion to theremainder of the roll. The severed bag is then readily pulled completelyover the garments with the hanger hook exposed. With the light plasticavailable for such purposes, a roll of about 3000 feet weighs less thanthirty pounds so that the rolls may be easily lifted in position on thesupport. Also, a series of rolls may be mounted on a single support toprovide various sizes of bags on a single support.

While the invention has been illustrated by reference to a specificdevice, there is obviously no intent to limit the device to theparticular details so described. For example, there could be provided anelectronic heating roller for forming the seal, and there are obviouslyother ways of moving the rolls into and out of contact with the platen.The surface hardened platen has been found to be highly satisfactory forboth the sealing and heating purposes slnce it provides a good solidbacking, which is not injured during such operations. However, bychanging the cutting structure and the sealing configuration, a softerplaten might be used. 7

I claim:

1. Bag making equipment comprising means for supporting a roll offlattened and wound plastic tubing, a rotary platen arranged to supportsaid tubing on a major port1on of an arc of its surface, a pair ofspaced rollers mounted adjacent said platen and arranged to be movedtoward and away from the surface of said platen, the first of saidrollers including a heating element partially spirally wound in a flat Vshape from the roller edges toward the center thereof and the otherroller including cutter elements spirally wound in a flat V shape fromthe roller edges toward the center thereof including a series of spacednotches to provide lands for holding adjacent cut portions together,means for rotating said rollers and platen at essentially the sameperipheral speeds, and means for alternately moving said sealing rollerand said cutting roller toward the surface of said platen atpredetermined intervals along said tubing so as to seal said tubing andcut a severance line through a major portion of said tubing adjacent toand spaced from the seal.

2. Equipment according to claim 1 in which the pair of spaced rollersare interconnected by gears with said platen for conjoint rotation.

3. Bag making equipment comprising means for supporting a roll offlattened and wound plastic tubing, a rotary platen arranged to supportsaid tubing on a ma or portion of an arc of its surface, a pair ofspaced rollers mounted adjacent said platen and arranged to be movedtoward and away from the surface of said platen, the first of saidrollers including a heating element partially spirally in a fiat V shapefrom the roller edges toward the center thereof and the other rollerincluding cutter elements spirally wound in a flat V shape from theroller edges toward the center thereof including a series of notches toprovide lands for holding adjacent cut portions together, means forrotating said rollers and platen at essentially the same peripheralspeeds, means for feeding and holding said tubing under tension on saidplaten, and means for alternately moving said heat sealing roller andsaid cutting roller onto the surface of said platen at predeterminedintervals along said tubing so as to seal said tubing and cut aseverance line through a major portion of said tubing adjacent to andspaced from the seal.

4. Equipment according to claim 3 in which the means for feeding andholding said tubing under tension on said platen includes a pair ofspaced, resiliently covered rollers mounted adjacent said platen.

5. Equipment according to claim 3 in which said feeding and holdingmeans for said tubing on said platen includes a concave feed rollarranged to stretch said plastic tubing laterally immediately prior tofeeding onto said platen.

6. Equipment for producing joined garment bags in an elongated strip offlattened plastic tubular material comprising a hardened metal rotaryplaten arranged to support said strip around a substantial portion ofits peripheral surface, a pair of spaced apart rubber rollers mounted insubstantial contact with said platen at spaced points therearound andarranged to hold the strip of material stretched in tension over thesurface of said platen, a sealing roller carrying a relatively thinheated member extending substantially across its lateral extent andthrough a minor arc of its periphery mounted adjacent said platen andbetween said rubber rollers and arranged for periodically contacting thecarried strip of plastic to form a lateral seal thereon, a cuttingroller mounted adjacent said platen and between said rubber rollers andcarrying a relatively thin discontinuous cutting member substantiallyacross its lateral extent and through a minor arc of its peripheralsurface and arranged for periodically cutting a discontinuous severanceline across the plastic strip, and means for programming the sequencesof sealing and cutting for forming unsevered bags of a predeterminedlength in the strip.

7. Equipment for producing joined garment bags in an elongated strip offlattened plastic tubular material comprising a concave roller arrangedto support such a strip of plastic material on its surface in positionto spread the plastic material laterally, a hardened metal rotary platenmounted adjacent to and spaced from said concave roller and arranged tosupport the strip of plastic material passing from said concave rolleraround a substantial portion of its peripheral surface, a pair of spacedapart rubber rollers arranged in contact with the surface of said platenat spaced positions so as to hold such a strip stretched in tension oversaid platen, a sealing roller carrying a relatively thin heated memberextending substantially across its lateral extent and through a minorarc of its peripheral surface, said sealing roller being mountedadjacent said platen and between said rubber rollers for periodicallycontacting a carried strip of plastic to form a lateral seal thereon, acutting roller mounted adjacent said platen and between said rubberrollers and carrying a relatively thin discontinuous cutting memberwhich extends substantially across its lateral extent and arranged forperiodically cutting a discontinuous severance line across the strip ofplastic, and means for programming the sequence of cutting and scalingfor forming unseparated bags of predetermined length in the strip.

8. Equipment for producing joined garment bags in an elongated strip offlattened plastic tubular material comprising a hardened metal rotaryplaten arranged to support the strip around a substantial portion of itsperipheral surface, a pair of spaced apart rubber rollers in substantialcontact with said platen at spaced points on its peripheral surface andarranged to hold such a strip stretched in tension over the platensurface, a sealing roller mounted adjacent said platen and between saidrubber rollers, said sealing roller including a pair of inwardlyspiralled V shaped heating elements arranged substantially thereacrossand through a narrow arc of its peripheral surface and arranged to movein contact with the plastic material forming a seal thereacross, acutting roller mounted adjacent said platen and between said rubberrollers, said cutting roller including a pair of inwardly spiralled Vshaped cutting members arranged to be moved into and out of contact withplastic material carried on the platen for cutting a discontinuousseverance line thereacross, means for alternately moving said sealingroller and said cutting roller into contact with plastic materialcarried on the platen whereby to initially seal the tubing with agenerally lateral seal and to partially cut said tubing adjacent anddownstream from the seal to form an easily severable joint betweenadjacent preformed bags, means for rewinding the tubing subsequent toits removal from the platen, and means for rotating the rollers and theplaten at essentially the same peripheral spee 9. Equipment according toclaim 8 in which the V shaped cutting members are in the form ofserrated blades arranged to only partially cut the tubular materialacross its lateral extent.

References Cited in the file of this patent UNITED STATES PATENTS141,487 Chambers Aug. 5, 1873 265,743 Bray Oct. 10, 1882 492,964 MeiselMar. 7, 1893 565,116 Meyer Aug. 4, 1896 2,679,280 Marsh May 25, 19542,732,887 Drew Jan. 31, 1956 2,735,156 Craver Feb. 21, 1956 2,800,163Rusch July 23, 1957 2,999,533 Slagel Sept. 12, 1961

1. BAG MAKING EQUIPMENT COMPRISING MEANS FOR SUPPORTING A ROLL OFFLATTENED AND WOUND PLASTIC TUBING, A ROTARY PLATEN ARRANGED TO SUPPORTSAID TUBING ON A MAJOR PORTION OF AN ARC OF ITS SURFACE, A PAIR OFSPACED ROLLERS MOUNTED ADJACENT SAID PLATEN AND ARRANGED TO BE MOVEDTOWARD AND AWAY FROM THE SURFACE OF SAID PLATEN, THE FIRST OF SAIDROLLERS INCLUDING A HEATING ELEMENT PARTIALLY SPIRALLY WOUND IN A FLAT VSHAPE FROM THE ROLLER EDGES TOWARD THE CENTER THEREOF AND THE OTHERROLLER INCLUDING CUTTER ELEMENTS SPIRALLY WOUND IN A FLAT V SHAPE FROMTHE ROLLER EDGES TOWARD THE CENTER THEREOF INCLUDING A SERIES OF SPACEDNOTCHES TO PROVIDE LANDS FOR HOLDING ADJACENT CUT PORTIONS TOGETHER,MEANS FOR ROTATING SAID ROLLERS AND PLATEN AT ESSENTIALLY THE SAMEPERIPHERAL SPEEDS, AND MEANS FOR ALTERNATELY MOVING SAID SEALING ROLLERAND SAID CUTTING ROLLER TOWARD THE SURFACE OF SAID PLATEN ATPREDETERMINED INTERVALS ALONG SAID TUBING SO AS TO SEAL SAID TUBING ANDCUT A SEVERANCE LINE THROUGH A MAJOR PORTION OF SAID TUBING ADJACENT TOAND SPACED FROM THE SEAL.